In the previous tutorial in this series, WoolseyWorkshop described how to connect to an Arduino WiFi by running a web server on the Arduino. But, running a local server comes with complications:
In order to extend this approach and allow your Arduino based server to be accessed over the internet, techniques such as port forwarding, external hosting, static IP addressing, or use of a Dynamic DNS service are required. Although doable, these techniques can be complicated, costly, or not very secure. For these reasons, they are not usually the best fit for hobbyists to access their Arduino devices over the internet.
This tutorial will instead utilize Adafruit’s Adafruit IO service to connect an Arduino to the outside world.
The post utilizes the latest version of the Adafruit IO Arduino library, updated for compatibility with external ESP32 WiFi modules, and serves as a good reference for getting started with Adafruit IO.
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